Specialized cutter blades for preparing intervertebral disc...

A - Human Necessities – 61 – B

Patent

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A61B 17/00 (2006.01)

Patent

CA 2644160

Cutter blades made of shape memory materials. Rotation of a cutter blade as part of a cutter assembly within an intervertebral disc space cuts the material present there for removal from the intervertebral disc space. Cutter blades with different attributes (such as throw length, cutter blade angle, type and location of blade edges) are adapted to achieve different objectives within the intervertebral disc space. The use of a hollow ground to enhance the cutting action of a blade edge is described in connection with the creation of cutter blades. A variety of thin cutter blades are described which may be used in the interior of a thin intervertebral disc (having a reduced distance between the endplates of the adjacent vertebral bodies).

Lames coupantes fabriquées en matériaux à mémoire de forme. La rotation d'une lame coupante faisant partie d'un ensemble coupant à l'intérieur d'un espace de disque intervertébral coupe le matériau présent à cet endroit pour le retirer de l'espace de disque intervertébral. Des lames coupantes de caractéristiques différentes (telles que longueur de lame, angle de lame coupante, type et localisation des tranchants de lame) sont adaptées pour atteindre différents objectifs à l'intérieur de l'espace de disque intervertébral. L'invention concerne également l'utilisation d'une base creuse pour augmenter l'action coupante d'un tranchant de lame en relation avec la création de lames coupantes. L'invention concerne également une variété de lames coupantes minces qui peut être utilisée à l'intérieur d'un mince disque intervertébral (présentant une distance réduite entre les plaques terminales des corps vertébraux adjacents).

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